I have the following file test.cfg: ADDRESS= NETMASK= GATEWAY= When I issue the command sed "/^ADDRESS/c\ADDRESS=1.2.3.4" I get ADDRESS=1.2.3.4NETMASK= GATEWAY= instead of ADDRESS=1.2.3.4 NETMASK= GATEWAY= So, a LF is missing. I'm using Busybox 1.4.0. It worked with 1.0. Thomas